According to psychologist Marisa Franco, friends are important to our happiness and well-being, and they often fulfill us even more than other relationships can. There are many benefits to having close friends. But for some, making friends is harder than for others. A lot depends on our attachment style. In her book "Platonic: How the Science of Attachment Can Help You Make - And Keep - Friends", Franco helps people identify their attachment style and gives advice for healthy friendships.